Juwan Thompson, Running Back

Ed Andrieski/Associated Press

Juwan Thompson will be a relatively unknown player in training camp after spending his years as a college player at Duke, but he is arguably the most complete undrafted running back the Broncos brought in.

Thompson is a tough runner, but he is also a very good receiver out of the backfield. In college, he played for David Cutcliffe, who was also the college coach of Peyton Manning at Tennessee.

Cutcliffe believes in Thompson, and you can bet he's told the Broncos what he can do.

Kenny Anunike, Defensive End

You've heard the theory before, and it hasn't changed—you can never have too many pass-rushers in the NFL.

Kenny Anunike is another undrafted free agent the Broncos brought in from Duke. At Duke, he was a menace to opposing quarterbacks.

As a senior, Anunike racked up six sacks while having 13.5 tackles for a loss. On top of that, he forced a fumble and even blocked a kick.

There aren't many positions to be had on the Denver defense, especially for an undrafted rookie, but Anunike may be able to do enough for the team to consider having more depth along the defensive line.

Bryn Renner, Quarterback

The Broncos kept three quarterbacks on the roster last year, and if they choose to do so again this year, there should be a spirited competition for that third spot between Bryn Renner and Zac Dysert.

Renner doesn't have excellent athletic ability or a strong arm, but he makes up for that by being an extremely smart player who understands the game.

At North Carolina, Renner completed 66.5 percent of his passes and threw for over 8,000 yards. He can make all the short-to-intermediate throws and is very good at taking what the defense gives him in order to move the chains.

Dysert will have his hands full with Renner if he wants to remain a part of the team going forward.